diff --git a/docs/designers-developers/developers/backward-compatibility/deprecations.md b/docs/designers-developers/developers/backward-compatibility/deprecations.md
index 12b1771484923..b5df2462e1050 100644
--- a/docs/designers-developers/developers/backward-compatibility/deprecations.md
+++ b/docs/designers-developers/developers/backward-compatibility/deprecations.md
@@ -35,6 +35,7 @@ The Gutenberg project's deprecation policy is intended to support backward compa
 - The PHP function `register_tinymce_scripts` has been removed. Use [`wp_register_tinymce_scripts`](https://developer.wordpress.org/reference/functions/wp_register_tinymce_scripts/) instead.
 - The PHP function `gutenberg_register_post_types` has been removed.
 - The `gutenberg` theme support option has been removed. Use [`align-wide`](https://wordpress.org/gutenberg/handbook/designers-developers/developers/themes/theme-support/#wide-alignment) instead.
+- The PHP function `gutenberg_prepare_blocks_for_js` has been removed. Use [`get_block_editor_server_block_settings`](https://developer.wordpress.org/reference/functions/get_block_editor_server_block_settings/) instead.
 
 ## 4.5.0
 - `Dropdown.refresh()` has been deprecated as the contained `Popover` is now automatically refreshed.
diff --git a/lib/client-assets.php b/lib/client-assets.php
index f072ee348402a..d33ebdd12fe93 100644
--- a/lib/client-assets.php
+++ b/lib/client-assets.php
@@ -702,28 +702,14 @@ function gutenberg_register_vendor_script( $handle, $src, $deps = array() ) {
  * array of registered block data keyed by block name. Data includes properties
  * of a block relevant for client registration.
  *
+ * @deprecated 5.0.0 get_block_editor_server_block_settings
+ *
  * @return array An associative array of registered block data.
  */
 function gutenberg_prepare_blocks_for_js() {
-	$block_registry = WP_Block_Type_Registry::get_instance();
-	$blocks         = array();
-	$keys_to_pick   = array( 'title', 'description', 'icon', 'category', 'keywords', 'supports', 'attributes' );
-
-	foreach ( $block_registry->get_all_registered() as $block_name => $block_type ) {
-		foreach ( $keys_to_pick as $key ) {
-			if ( ! isset( $block_type->{ $key } ) ) {
-				continue;
-			}
-
-			if ( ! isset( $blocks[ $block_name ] ) ) {
-				$blocks[ $block_name ] = array();
-			}
-
-			$blocks[ $block_name ][ $key ] = $block_type->{ $key };
-		}
-	}
+	_deprecated_function( __FUNCTION__, '5.0.0', 'get_block_editor_server_block_settings' );
 
-	return $blocks;
+	return get_block_editor_server_block_settings();
 }
 
 /**
@@ -1081,7 +1067,7 @@ function gutenberg_editor_scripts_and_styles( $hook ) {
 	// Preload server-registered block schemas.
 	wp_add_inline_script(
 		'wp-blocks',
-		'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . json_encode( gutenberg_prepare_blocks_for_js() ) . ');'
+		'wp.blocks.unstable__bootstrapServerSideBlockDefinitions(' . json_encode( get_block_editor_server_block_settings() ) . ');'
 	);
 
 	// Get admin url for handling meta boxes.
diff --git a/phpunit/class-prepare-for-js-test.php b/phpunit/class-prepare-for-js-test.php
deleted file mode 100644
index 38dceb8fec6df..0000000000000
--- a/phpunit/class-prepare-for-js-test.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-/**
- * Block types registration Tests
- *
- * @package Gutenberg
- */
-
-/**
- * Test gutenberg_prepare_blocks_for_js()
- */
-class Prepare_For_JS_Test extends WP_UnitTestCase {
-
-	function tearDown() {
-		parent::tearDown();
-
-		$registry = WP_Block_Type_Registry::get_instance();
-		$registry->unregister( 'core/dummy' );
-	}
-
-	function test_gutenberg_prepare_blocks_for_js() {
-		$name     = 'core/dummy';
-		$settings = array(
-			'icon'            => 'text',
-			'render_callback' => 'foo',
-		);
-
-		register_block_type( $name, $settings );
-
-		$blocks = gutenberg_prepare_blocks_for_js();
-
-		$this->assertArrayHasKey( $name, $blocks );
-		$this->assertSame( array( 'icon' => 'text' ), $blocks[ $name ] );
-	}
-}